[968] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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[1192] | 27 | // $Id: G4CrossSectionChargeTransferExp.cc,v 1.6 2009/06/10 13:32:36 mantero Exp $ |
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[1347] | 28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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[968] | 29 | // |
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| 30 | // Contact Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) |
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| 31 | // |
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| 32 | // Reference: TNS Geant4-DNA paper |
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| 33 | // Reference for implementation model: NIM. 155, pp. 145-156, 1978 |
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| 34 | |
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| 35 | // History: |
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| 36 | // ----------- |
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| 37 | // Date Name Modification |
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| 38 | // 28 Dec 2007 M.G. Pia Created |
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| 39 | // |
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| 40 | // ------------------------------------------------------------------- |
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| 41 | |
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| 42 | // Class description: |
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| 43 | // Total cross section for incident p charge transfer from experimental data |
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| 44 | // interpolation |
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| 45 | // Reference: http://www-cfadc.phy.ornl.gov/astro/ps/data/ |
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| 46 | // |
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| 47 | // The fit formula is: |
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| 48 | // ln(cross section)=\sum C_i T_i(x) |
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| 49 | // x=[2ln(E)-ln(E_min)-ln(E_max)]/[ln(E_max)-ln(E_min)] |
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| 50 | // T_1(x)=1 |
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| 51 | // T_2(x)=x |
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| 52 | // T_n+2(x)=2T_n+1(x)-T_n(x) |
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| 53 | // |
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| 54 | // Where cross section is given in 10^-16 cm2 and E is in keV, |
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| 55 | // E_min=1e-4 keV and E_max=1.e3 keV. |
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| 56 | |
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| 57 | // Further documentation available from http://www.ge.infn.it/geant4/ |
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| 58 | |
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| 59 | // ------------------------------------------------------------------- |
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| 60 | |
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| 61 | #include <sstream> |
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| 62 | |
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| 63 | #include "G4CrossSectionChargeTransferExp.hh" |
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| 64 | #include "G4Track.hh" |
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| 65 | #include "G4DynamicParticle.hh" |
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| 66 | #include "G4Proton.hh" |
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| 67 | #include "G4VEMDataSet.hh" |
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| 68 | #include "G4EMDataSet.hh" |
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| 69 | #include "G4VDataSetAlgorithm.hh" |
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| 70 | #include "G4LogLogInterpolation.hh" |
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| 71 | #include "G4Material.hh" |
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| 72 | #include "G4DataVector.hh" |
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| 73 | |
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| 74 | G4CrossSectionChargeTransferExp::G4CrossSectionChargeTransferExp() |
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| 75 | { |
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| 76 | // Default energy limits (defined for protection against anomalous behaviour only) |
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| 77 | name = "ChargeTransferExp"; |
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| 78 | lowEnergyLimit = 0.1 * eV; |
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| 79 | highEnergyLimit = 1.0 * MeV; |
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| 80 | |
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| 81 | // Units: energies in eV, cross sections in cm2 |
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| 82 | unit1 = eV; |
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| 83 | unit2 = cm2; |
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| 84 | |
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| 85 | // Create DataSets from experimental data to be interpolated |
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| 86 | G4VEMDataSet* dataSet = 0; |
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| 87 | G4String materialName; |
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| 88 | |
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| 89 | // ---- MGP ---- Primitive implementation in 1st iteration |
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| 90 | // Load all experimental data sets available |
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| 91 | // Improvement in later iterations: load only the data sets of materials present in the |
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| 92 | // MaterialTable (i.e. actually used in the simulation), or load on demand |
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| 93 | |
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| 94 | // H2 cross section data |
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| 95 | dataSet = LoadData("/charge_transf/cs-p-H2"); |
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| 96 | materialName = "H2"; |
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| 97 | crossMap[materialName] = dataSet; |
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| 98 | |
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| 99 | // He cross section data |
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| 100 | dataSet = LoadData("/charge_transf/cs-p-He"); |
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| 101 | materialName = "He"; |
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| 102 | crossMap[materialName] = dataSet; |
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| 103 | |
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| 104 | // CO cross section data |
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| 105 | dataSet = LoadData("/charge_transf/cs-p-CO"); |
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| 106 | materialName = "CO"; |
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| 107 | crossMap[materialName] = dataSet; |
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| 108 | |
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| 109 | // CO2 cross section data |
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| 110 | dataSet = LoadData("/charge_transf/cs-p-CO2"); |
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| 111 | materialName = "CO2"; |
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| 112 | crossMap[materialName] = dataSet; |
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| 113 | |
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| 114 | // N2 cross section data |
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| 115 | dataSet = LoadData("/charge_transf/cs-p-N2"); |
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| 116 | materialName = "N2"; |
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| 117 | crossMap[materialName] = dataSet; |
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| 118 | } |
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| 119 | |
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| 120 | |
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| 121 | G4CrossSectionChargeTransferExp::~G4CrossSectionChargeTransferExp() |
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| 122 | { |
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| 123 | std::map<G4String,G4VEMDataSet*,std::less<G4String> >::iterator pos; |
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| 124 | for (pos = crossMap.begin(); pos != crossMap.end(); ++pos) |
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| 125 | { |
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| 126 | G4VEMDataSet* dataSet = (*pos).second; |
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| 127 | delete dataSet; |
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| 128 | dataSet = 0; |
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| 129 | } |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | G4double G4CrossSectionChargeTransferExp::CrossSection(const G4Track& track) |
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| 134 | { |
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| 135 | G4double sigma = DBL_MIN; |
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| 136 | |
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| 137 | const G4DynamicParticle* particle = track.GetDynamicParticle(); |
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| 138 | G4double e = particle->GetKineticEnergy(); |
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| 139 | |
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| 140 | // Get the material the track is in |
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| 141 | G4Material* material = track.GetMaterial(); |
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| 142 | G4String materialName; |
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| 143 | materialName = material->GetName(); |
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| 144 | |
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| 145 | // Check whether cross section data are available for the current material |
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| 146 | |
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| 147 | std::map<G4String,G4VEMDataSet*,std::less<G4String> >::const_iterator pos; |
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| 148 | pos = crossMap.find(materialName); |
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| 149 | if (pos!= crossMap.end()) |
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| 150 | { |
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| 151 | G4VEMDataSet* dataSet = (*pos).second; |
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| 152 | // G4VEMDataSet* dataSet = crossMap["He"]; |
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| 153 | const G4DataVector energies = dataSet->GetEnergies(0); |
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| 154 | G4int nPoints = energies.size(); |
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| 155 | |
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| 156 | G4double eMin = energies[0]; |
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| 157 | G4double eMax = energies[nPoints-1]; |
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| 158 | |
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| 159 | if (e >= eMin && e <= eMax) |
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| 160 | { |
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| 161 | sigma = dataSet->FindValue(e); |
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| 162 | } |
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| 163 | } |
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| 164 | return sigma; |
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| 165 | } |
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| 166 | |
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| 167 | |
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| 168 | G4VEMDataSet* G4CrossSectionChargeTransferExp::LoadData(const G4String& fileName) |
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| 169 | { |
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| 170 | std::ostringstream ost; |
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| 171 | ost << fileName << ".dat"; |
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| 172 | G4String nameF(ost.str()); |
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| 173 | |
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| 174 | char* path = getenv("G4LEDATA"); |
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| 175 | if (!path) |
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| 176 | { |
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| 177 | G4String excep("G4EMDataSet - G4LEDATA environment variable not set"); |
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| 178 | G4Exception(excep); |
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| 179 | } |
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| 180 | |
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| 181 | G4String pathString(path); |
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| 182 | G4String dirFile = pathString + nameF; |
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| 183 | std::ifstream file(dirFile); |
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| 184 | std::filebuf* lsdp = file.rdbuf(); |
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| 185 | |
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| 186 | if (! (lsdp->is_open()) ) |
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| 187 | { |
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| 188 | G4String s1("G4CrossSectionChargeTransferExp::LoadData data file: "); |
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| 189 | G4String s2(" not found"); |
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| 190 | G4String excep = s1 + dirFile + s2; |
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| 191 | G4Exception(excep); |
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| 192 | } |
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| 193 | |
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| 194 | G4double a = 0; |
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| 195 | G4int k = 1; |
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| 196 | G4DataVector* energies = new G4DataVector; |
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| 197 | G4DataVector* data = new G4DataVector; |
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| 198 | do |
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| 199 | { |
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| 200 | file >> a; |
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| 201 | G4int nColumns = 2; |
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| 202 | // The file is organized into two columns: |
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| 203 | // 1st column is the energy |
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| 204 | // 2nd column is the corresponding value |
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| 205 | // The file terminates with the pattern: -1 -1 |
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| 206 | // -2 -2 |
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| 207 | if (a == -1 || a == -2) |
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| 208 | { |
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| 209 | } |
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| 210 | else |
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| 211 | { |
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| 212 | if (k%nColumns != 0) |
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| 213 | { |
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| 214 | G4double e = a * unit1; |
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| 215 | energies->push_back(e); |
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| 216 | k++; |
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| 217 | } |
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| 218 | else if (k%nColumns == 0) |
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| 219 | { |
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| 220 | G4double value = a * unit2; |
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| 221 | data->push_back(value); |
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| 222 | k = 1; |
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| 223 | } |
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| 224 | } |
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| 225 | } while (a != -2); // end of file |
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| 226 | |
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| 227 | file.close(); |
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| 228 | G4VDataSetAlgorithm* algo = new G4LogLogInterpolation; |
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| 229 | G4VEMDataSet* dataSet = new G4EMDataSet(0,energies,data,algo); |
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| 230 | |
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| 231 | //dataSet->PrintData(); |
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| 232 | |
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| 233 | return dataSet; |
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| 234 | |
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| 235 | } |
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